{
  "manageEntity": {
    "action": "Save",
    "entityId": "1391880783",
    "entityType": "Track",
    "nonce": "0x773ef41a4a577e5bfda842eb4591b37190cf18b5a95e36b056e4aa7332835cd8",
    "signature": "0x47ae1f5ea460f432d57ae3876fe822b750df40fa38562773017077133b9c48ed516bd8fa402c122c7b90798987d395243e38dd4cedcabf263fe00ee2bacb26921c",
    "signer": "0xC041f26f283EAf5F5C78Ab3694f6517cd2d3a1F7",
    "userId": "93075"
  }
}